Arrive 
Alaska Railroad 
ARROW 
ACCOUNTING RATE OF RETURN 
Association for Radiation Research 
Airborne Radio Relay 
Anti-Repeat Relay 
Arrange 
arrangement 
Array 
Arrival 
Average Rate of Return 
absolute risk reduction 
Academia Republicii Romania 
Academy of Radiology Research 
accelerating rotarod 
Accounting and Reporting Recommendations 
Address Range Register 
Address Range Registrers 
Address Record Register 
Adjustable Reset Response 
adjusted relative risk 
adjusted relative risks 
Air Reconnaissance Request 
Airborne release rate 
Akita Rocket Range 
Alaska Railroad Corporation 
Alberta Resources Railway 
aldosterone/plasma renin activity ratio 
aldosterone/renin ratio